TW200837618A - Multi-touch auto scanning - Google Patents

Abstract

A system and method for autonomously scanning a sensor panel device, such as a multi-touch panel, is disclosed. In one embodiment, the system and method disables a sensor panel processor after a first predetermined amount of time has elapsed without the sensor panel device sensing any events. One or more system clocks can also be disabled to conserve power. While the processor and one or more system clocks are disabled, the sensor panel device can periodically autonomously scan the sensor panel for touch activity. Accordingly, if one or more results from the autonomous scans exceed a threshold, the sensor panel device re-enables the processor and one or more clocks to actively scan the sensor panel. If the threshold is not exceeded, then the sensor panel device continues to periodically autonomously scan the sensor panel without intervention from the processor. Furthermore, the sensor panel device can periodically perform calibration functions to account for any drift that may be present in the system.

Description

200837618 IX. Description of the Invention: TECHNICAL FIELD OF THE INVENTION The present invention generally relates to electronic devices (e.g., touch screen devices) capable of deactivating various components (e.g., system clocks and processors) during periods of inactivity. A system and method for initiating a low power automatic scan mode during an inactivity period. [Prior Art] Many types of input devices are currently available for operation within a computing system, such as buttons or buttons, a mouse, a trackball, a touch panel, a joystick 'touch screen, and the like. In particular, touch screens are becoming more common due to their ease of operation and the general cost of life and its decline. Touch screen can be. A touch panel can be a transparent panel having a touch-sensitive surface. The touch panel can be positioned in front of the screen so that the touch-sensitive surface covers the viewable area of the display screen. Touching the 35 screen allows the user to make selections and move the cursor by simply touching the display screen with a finger or stylus. In general, the touch screen: recognizes the touch and touch position on the display screen, and the calculation system: the touch can be interpreted, and then the action is performed according to the touch event. The ability to re-contact points when multiple objects touch the sensing surface. Therefore, that is, the choice of many conventional touch panel technologies - the limitation is that it can only report single or touch events, 卽 #妾炙舌 从 从 从 #_ j 1 ”.

Generally, by providing the average resistance or capacitance, the value of the touch point of the η clothes is 128015.doc 200837618. Bu, one of the problems with Xu Xi Touch Benefits is the amount of power it consumes when actively scanning the touch screen panel. The problem of high power consumption is::The temple is not important, because actively scanning the touch sensor panel and processing the cows: the limited power supply that can easily consume the handheld device has no touch activity during an extended period of time, Scanning can be wasted. Stop f (ie: loss of power consumption during the period:::: may be a remedy: (ie, turn off) the touch panel or touch panel device. But doing so can have several drawbacks, such as when again... Activity Tuesday; the panel consumes more power (special m non-extended time period), and is inconvenient to use, because it must wait for the touch panel to be turned on again. In addition, the user may forget to close the touch panel, * ^, ^ ^ Actively scan the touch panel for the piece, the performance, but the user does not input any data. [Disclosed] This article reveals a multi-touch touch system. One aspect of the system is about not controlling Touch 糸.^, / Zhou Gong during the time to disable the components of the touch panel device to save power. Can stop the state of the system., ', i including the touch panel processor and the system of the touch system On the other hand, it is about the automatic scanning mode of the scanning of the touch panel, and the sniper is actively scanning the touch for the touch event. (4) The other aspect of the multi-touch system is enabled. At the predetermined amount of time After the smff mode, the touch panel is scanned for touch events. More 128015.doc 200837618 The money control system can also have a calibration timer that automatically enables the multi-touch processor and system clock to be at different predetermined times. The main drawing and calibration functions are implemented after the occurrence. The other aspect of the multi-touch system is to measure the stray capacitance in the touch panel sensor during the automatic scanning mode.

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In the following description of the preferred embodiments, reference to the drawings Other embodiments may be utilized and structural changes may be made without departing from the scope of the preferred embodiments of the invention. A plurality of touch sensors in the multi-touch panel enable the computing system to sense multiple touch events (touch of fingers or other objects at different locations on the touch-sensitive surface at about the same time) and implement previous touch Additional features not available for sensor devices. Although specific embodiments are described herein with respect to capacitive touch sensors in a multi-touch panel, it should be understood that the specific embodiments of the present invention are not limited thereto, but can be generally applied to any type of multiple touch sense. The use of the detector technology may include a resistive touch sensor, a surface acoustic wave touch sensor, an electromagnetic touch sensor, a near field imaging touch sensor, and the like. In addition, although a touch sensor in a multi-touch panel can be described herein with respect to a row and row of touch sensor orthogonal arrays, it should be understood that the specific embodiment of the present invention is not limited to the positive parent array, but may be Generally applied to touch sensors in any number of dimensions and orientations, including diagonal, concentric, three-dimensional and random 128015.doc 200837618 to 0 In general, multiple touch panels can detect simultaneous or Multiple touches (touch events or touch points) occur at the same time and identify and track their position. An example of a multi-touch panel is described in the applicant's co-pending U.S. Application Serial No. 1/842,862, entitled "Multip〇int T〇uchs_,,:^ May 6, 2004 application, and at 2 〇〇 6 May lla is published as US Published Application No. 2006/0097991, the contents of which are incorporated herein by reference.

Figure 1 illustrates a computing system 100 that uses a touch sensor in accordance with an embodiment. Computing system 100 may correspond to a computing device, such as a desktop, knee, tablet or handheld device, including a personal digital assistant (PDA), digital music and/or video player, and a mobile phone. The computing system 100 can also correspond to a public computer system such as a kiosk, an automated teller machine (ATM), a point-of-sale (POS) machine, an industrial machine, a game machine, an aircraft, an automatic (four) machine, an airline ticket terminal, a restaurant reservation. Terminals, customer service stations, library terminals, learning devices, etc. Computing system 100 can include - or multiple multi-touch panel processors and peripheral devices 104, as well as multiple touch subsystems 1G6. One or more processes crying 1.2 can be an ARM968 processor or other with similar functionality and capabilities: In other embodiments, dedicated logic can be used instead of implementing multiples. Touch processor functionality. The peripheral device 1 4 may include, but is limited to, a random access memory (ram) or other type of memory or memory, and a watch timer. The home touch system 1〇6 may include, but is not limited to, one or more analog channels (10), channel sweep logic (10) 128015.doc 10-200837618, and driver logic 114. The channel scan logic 11 can access the ram 112, autonomously reading data from the analog channel and providing control for the analog channel. This control may include multiplexing the rows of the multi-touch panel 124 to the analog channel 1〇8. In addition, channel scan logic 10 can control driver logic and stimulus signals that are selectively applied to multiple touch panels 124. In some embodiments, the multi-touch subsystem 106 can be integrated into a single application-specific integrated circuit (ASIC). The driver logic 114 can provide a plurality of multi-touch subsystem outputs 116 and can have a dedicated interface for driving the south voltage driver, which is comprised of the decoder 12 and subsequent level shifters and driver stages ,8, although The level shift function is implemented before the decoder function. The level shifter and driver 118 can provide a level shift from a low voltage level (eg, CMOS level) to a higher voltage level, thereby providing better signal to noise for noise reduction purposes (S /N) ratio. The decoder 120 can decode the drive interface signal into one of the output, and the maximum number of columns in the N-series panel. The decoder 12A can be used to reduce the number of drive lines required between the high voltage driver and the multi-touch panel 124. Each of the multiple touch panel column inputs 122 can drive one or more columns within the multi-touch panel 124. In some embodiments, driver 118 and decoder 12 can be integrated into a single ASIC. However, in other embodiments, driver 118 and decoder 120 may be integrated into driver logic 114, and in other embodiments, driver 118 and decoder 12 may be completely eliminated. Multiple touch panel 124 may, in some embodiments, include a capacitive sensing medium having a plurality of column traces or drive lines and a plurality of row traces or sense lines, although other sensing media may also be used. The columns and traces may be formed by a conductive medium such as indium tin oxide (IT0) or antimony tin oxide (AT〇), although other transparent and opaque materials such as copper may also be used. In some embodiments, the column and row traces can be formed on opposite sides of the dielectric material and can be perpendicular to each other, although other non-orthogonal directions can be used in other embodiments. For example, in a polar coordinate system, the sense lines can be concentric circles and the drive lines can be radially extended lines (or vice versa). Therefore, it should be understood that the terms "column" and "row", ", first dimension" and "second dimension", or the first axis and the 'second axis' are used in this document to include not only orthogonal lattices. a grid, and including cross traces of other geometric configurations having first and second dimensions (e.g., concentric and radial lines of a polar coordinate configuration). It should also be noted that in other embodiments, columns and rows may be used. Formed on a single side of the substrate, or may be formed on two separate substrates separated by a dielectric material. In some embodiments, the 'I electrical material may be transparent, such as glass, or may be formed of other materials, For example, polyester resin. Additional dielectric overlays can be placed on the column or row traces to reinforce the structure and protect the entire assembly from damage. I at the ''parent fork'' of the trace, where the traces pass each other Above and below (but without direct electrical contact with each other), the trace essentially forms two electrodes (although more than two traces can be crossed). The intersections of the column and row traces can represent capacitive sensing nodes. And It is particularly useful for the image component (pixel) 126 to be used to capture touch, image, and time in the multi-touch panel 124. (In other words, the multi-touch subsystem 106 has determined whether it is in multiple touch. After sensing the touch event at each touch sensor in the panel, the pattern of the touch sensor in which the touch event occurs in the multi-touch panel can be regarded as the “touch” image, (for example, the finger of the touch panel) The pattern).) When keeping the given column at 〇(:, column and row 128015.doc -12- 200837618: the capacitance between the poles appears as a stray capacitance number stimulus on all lines, which appears as Mutual d wood with AC# quantity change detection will be hammered; 4 S1§ can be measured by Csig" The presence or absence of a finger or other object near the touch panel. Multi-touch panel 124 trip 』Object~”·% 多重 one or more analog channels 1〇8 (this article also 〃,,,, 々, Gan L 〒冉 事件 event detection and demodulation circuit). In a specific embodiment, each row of electricity 108 is connected to a dedicated analog channel 8 however, in other In an embodiment, the lever γ 丄 至 丨 # # 仃 仃 仃 仃 仃 仃 仃 仃 仃 仃 仃 仃 仃 仃 仃 仃 仃 仃 仃 仃 仃 仃 仃 仃 仃 仃 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 The multi-touch panel processor Η 2 receives the output and performs actions according to the output. The basin may include, but is not limited to, moving objects, such as cursors or indicators, scrolling or panning, adjusting _ settings, opening a broadcast or file, viewing a menu, making Select, order, connect to the peripheral device of the host device, answer the phone call 'send a phone call, terminate the phone call, change the volume or audio settings to store information about the live communication, such as address, frequent dialing number Weights, received calls, missed calls, login to a computer or computer network, allowing authorized individuals to access restricted areas of the computer or computer network, and loading users associated with the user's preferred configuration of the computer desktop Profiles allow access, page breaks, launch specific programs, encrypt or decode messages and/or similar actions. The host processor 128 can also perform additional functions that are independent of the multi-touch panel processing and can be coupled to the program storage 132 and the display device 130', e.g., for providing a user interface to the user of the device. Figure 2a illustrates an exemplary capacitive multiple touch panel 2〇〇. Figure 仏 indicates positioning 128015.doc -13 - 200837618 There is a stray capacitance Cstray for each pixel 2〇2 at the intersection of the column 204 and row 206 traces (although for the sake of simplicity of the diagram, only the One line of Cstray). It should be noted that although Figure 2a illustrates substantially vertical columns 2〇4 and rows 206, it need not be so aligned, as described above. In the example of the figure, an AC stimulus Vstim 214 is applied to one column, while all other columns are connected to dc. This stimuli causes charge to be injected into the row electrodes through the mutual capacitance at the point of intersection. This charge is Qsig = Csig X Vstm. Each row 206 can be selectively coupled to one or more analog channels (see analog channel 1 〇 8 in Figure 1). Figure 2b is a side elevational view of an exemplary pixel 2〇2 in a steady state (no touch) condition. In Figure 2b, the electric field lines 208 of the row 206 and column 204 traces or the mutual electric valley between the electrodes separated by the dielectric 21〇 represent the "number capacitance Csig" between the column and the row electrode and can stop charging. Injecting from the stimulated column to the row electrode. Since the Csig is referenced to the virtual ground, it also constitutes a stray capacitance. For example, the total stray capacitance of the row electrode can be all the sigma electric Csig between a given row and all column electrodes. Sum. Given that cSig is, for example, 〇75°F and the row electrode intersects fifteen column electrodes, the overall stray capacitance on the row electrode is at least 15 X 〇.75pF=11.25pF. However, in reality, due to the row electrode to The stray capacitance of the multi-touch ASIC or other stray capacitance in the system may have a larger overall stray capacitance. Figure 2c is a side view of an exemplary pixel 2〇2 in dynamic (touch) conditions. In c, 'the finger 212 has been placed near the pixel 2 0 2 . The finger 212 is a low-impedance object at the signal frequency, and represents the CA grounding path t through the main body capacitor Cb 〇 dy. The body has a self-capacitance C | 3 to the ground. 〇CJy, in other respects with the size of the subject and a few The shape is a functional relationship. If the finger 212 blocks 128015.doc -14- 200837618, some of the electric field lines between the row electrodes and the row electrodes (the exiting dielectrics and the fringe fields passing through the two electrodes above the column electrodes) pass through The inherent electrical path in the finger and the body divides the electric field line to ground, thus reducing the steady-state signal capacitance Csig to Csig-sense. In other words, the combined body and finger capacitance are used to reduce the CS1g amount (in this paper) It can also be called csig_s(3)π) and can be used as a shunt or dynamic return path to ground, thereby blocking some of the eMules and producing a reduced net signal capacitance. The signal capacitance at the pixel becomes CSlg_ACsig, where Csig stands for static (no touch) component, while ACsig stands for dynamic (touch) component. It should be noted that because the finger, palm or other object is unable to block all electric fields, especially the electric fields that are kept in the dielectric material as a whole, CSig-ACsig can Always non-zero. In addition, it should be understood that due to more force or more complete pressing of the finger onto the multi-touch panel, the finger may tend to flatten, thereby blocking the increasing electric field, This ACsig is variable and represents the full extent of pressing a finger onto the panel (ie from "no touch" to, full touch, range). " Referring again to Figure 2a, as described above, Vstim can be Signal 214 is applied to a column within multi-touch panel 200 to detect signal/capacitance changes in the presence of a finger, palm or other object. Vstim signal 214 may include one or more burst trains 21 6 at a particular frequency. Each pulse train includes a number of pulses. Although the pulse train 216 is shown as a square wave, other waveforms, such as sinusoids, may be used. A plurality of burst trains 216 at different frequencies can be sent for noise reduction purposes to minimize the effects of any noise sources. The Vstim signal 2 14 essentially injects charge into the array via the signal capacitance Csig and can be applied to one of the multiple touch panels 2 at a time, while at the same time being 128015.doc • 15- 200837618 in other embodiments, two More than one segment, and 歹J ' while all other columns in the region remain at the DC level. However, the multi-touch panel can be split into two or 乂8^1!1 signals 214 applied to one of the segments. Other columns remain at the DC voltage.

1 Combine to - the various types of channels available - as a result, it represents the mutual capacitance between the stimulated column and the row connected to the column. Specifically, this mutual capacitance consists of the signal capacitance Csig and any variation Csig sense sensed within the signal capacitance due to fingers, hands f or other body parts or objects. The row values provided by the analog channel can be added in parallel when stimulating the single-column: either 丄 or can be provided in series. If all of the I's that represent the tantalum capacitor for the row are available, the other column within the multi-touch panel 2 can be stimulated: all other columns are held at the DC voltage and the signal capacitance measurement can be repeated. Finally, if Vstim has been applied to all columns and the signal capacitance values for all the rows in all columns have been captured (ie, "scan" the entire multi-touch panel 7〇〇), then for the entire multi-touch The control panel 200 obtains a ''snapshot' of all pixel values. This snapshot data can initially be saved in the multi-touch subsystem for later transmission for interpretation by other devices within the computing system, such as a host processor. The computing system acquires, saves, and interprets multiple fast, captures, detects, and tracks multiple touches and performs other functions. Figure 3a s brother's exemplary analog channel or event detection and demodulation circuit or eve The analog channel 300 can appear in the multi-touch subsystem. One or more rows from the multi-chamber control panel can be connected to various types of ratio channels 3. The various types of ratio channels 300 can include a virtual ground charge amplifier 302, a signal Mixing ^ offset compensation, rectifier 332, subtractor 334, and analog to 128015.doc -16- 200837618 digital converter (ADC) 308. Figure 3a also shows the steady state signal capacitance Csig in dotted lines (when facing multiple touch panels) Inside When a column of input stimuli VsUm is applied and no fingers, palms, or other objects are present, the steady-state signal capacitance Csig can be promoted by the multi-touch panel line connected to the analog channel 300, and the dynamic signal capacitance Csig-ACsig (which can appear Appears on a finger, palm or other object. The VsUm applied to one of the multiple touch panels can be generated as a square wave cluster, or as a non-DC signaling within other forms of DC signals, although in some embodiments, The square wave representing Vstim can be sent after and after other non-Dc transmissions. If Vstim is applied to a column and a signal capacitance appears at one of the lines of the analog channel 3, the output of the charge amplifier 3〇2 can be

Vref is the center of the pulse train 31 〇, Vref is a fraction of the pp amplitude of the peak-to-peak (PP) amplitude system Vstim in steady state, which corresponds to the gain of the charge amplifier 302, which is equal to the signal capacitance Csig and the former Set the amplifier to feedback the ratio of the capacitance cfb. For example, if Vstim includes 18 v pulses and

The gain of the charge amplifier is 〇·1, and the output of the charge amplifier can be a V ρ-ρ pulse. This output can be mixed with the demodulated transforming wave 3 16 in the signal mixer 3〇4. Since the stimulus signal can be a square wave, it is advantageous to use a sinusoid to demodulate the waveform to remove the harmonics of the square wave. In order to reduce the stop-band chopping of the mixer at a given stimulation frequency, it is advantageous to use a Gaussian-shaped sine wave. The demodulated waveform can have the same frequency as the stimulus Vstim and can be synthesized from the lookup table to enable the generation of demodulated waveforms of any shape from the towel. ^ Outside the sine wave, you can program any waveform to tune the filter of the mixer. 128015.doc •17- 200837618 In some embodiments, Fstim 3

The frequency and amplitude are adjusted by selecting different digital waveforms within the LUT 3 12 or using other digital logic to generate waveforms in different ways. The signal mixer can be demodulated by subtracting Fstim 316 from the output of the variable charge amplifier 31〇, two

Better noise rejection. Signal mixer 3G4 rejects all frequencies outside the passband, which in one example can be approximately +8 周围 around Fstim. This noise rejection is beneficial in noise environments with many sources of noise, such as 802.H, Bluetooth, etc., all of which have an interference-sensitive (feme-farad level) analog channel 3 Some characteristic frequencies of 〇〇. Since the signal frequencies entering the signal mixer can have the same frequency, the signal mixer can be considered a synchronous rectifier so that the output of the signal mixer is essentially a rectified waveform. Offset compensation 306 can then be applied to signal mixer output 314, which removes the effects of static Csig, leaving only the effect appearing as result 3242ACsig. Offset compensation 3〇6 can be implemented using offset mixer 330. The offset compensation output 322 can be generated by rectifying the Fstim 316 using a rectifier 332 and mixing the rectifier output 336 with an analog voltage from a digital to analog converter (Dac) 32 在 in the offset mixer 33A. The DAC 320 can generate an analog voltage based on the digital value selected to increase the dynamic range of the analog channel 300. A subtractor 334 can then be used to subtract the offset compensation output 322' from the signal mixer output 3 14 which can be proportional to the analog voltage from the DAC 320, thereby producing a subtractor output 3 3 8 which can represent the touch The change in signal capacitance ΔCsig that occurs when the capacitive sensor is stimulated. The subtractor output 338 is then integrated and then converted to a digital value by the ADC 308. Some specific 128015.doc -18- 200837618 in the example of the 'integrator and ADC function combination, and ADC 308 can be an integral ADC 'such as Σ_ AADC, which can sum and average several consecutive digits' to generate Results 324. Figure 3b is a more detailed illustration of the charge amplifier (virtual grounded amplifier) 3〇2' at the input of the analog channel and the capacitance that can be seen by the multi-touch panel (see dotted line) and seen by the charge amplifier. As described above, there may be an inherent stray capacitance Cstray at each pixel on the multi-touch panel. In the virtual grounding amplifier 302, if the + (non-inverted) input is connected to Vref, the gas reversed input is also driven to Vref, and 0 is established (: operating point. Therefore, no matter how many Csigs appear, the input is always driven to Vref Due to the characteristics of the virtual grounding amplifier 03, the charge stored in (8 讧叮 is constant, because the charge amplifier will keep the voltage across the Cstray constant. Therefore, no matter what the future will be Cstray adds to - input, the net charge into Cstray is always zero. Therefore, the input charge is held when the corresponding column is held at DC

Qsig-sense=(Csig-ACsig-sense) Vstim is zero, and it is completely functional with Csig and Vstim when stimulating the corresponding column. In either case, since there is no charge across the Csig, the stray capacitance is rejected and essentially exits any equation. Therefore, even if there is a hand on the multi-touch panel, although Cstray can be increased, the output will not be affected by Cstray changes. The gain of the virtual ground amplifier 302 is always small (e.g., 〇1) and is equal to the ratio of Csig (e.g., 2 PF) to the feedback capacitor Cfb (e.g., 2 〇 pF). The feedback capacitor Cfb can be adjusted to convert the charge Qsig into a voltage v〇ut. Therefore, the output Vout of the virtual ground amplifier 302 is equal to the ratio of -Csig/Cfb multiplied by the voltage of Vstim of the reference Vref. The higher voltage Vstim pulse can therefore appear at the output of the virtual ground amplifier 302 when the smaller pulse has a magnitude of 3264 by reference word ^ 128015.doc -19- 200837618. However, when a finger appears, the output of the vibrating zone identified by the reference character 328 can be reduced, because the plutonium capacitance is reduced for the purpose of noise rejection, and the multi-touch can be driven at different frequencies at night. Control panel. Since the noise is usually stored at a special frequency (for example, most of the Feng (4).), changing the scanning pattern can reduce the compatibility of the noise. Thus, in some embodiments, a plurality of burst train clusters can be used to stimulate channels (e.g., columns) of the multi-touch panel. For frequency repelling purposes, the frequency of the burst column can be changed from one to another. Figure 3c illustrates the multi-burst train 3, (10) one of the exemplary stimulus signals VStim 'each has a fixed number of pulses, There are different frequencies of FSUm (eg 140 kHz, 2 〇〇 kHz, and 260 kHz). With regard to multiple pulse trains at different frequencies, different results can be obtained at each frequency. Therefore, if static interference occurs at a specific frequency, the signal result at this frequency /, the result of its own /, the frequency of the other frequency can be destroyed. The damage result can be eliminated and the remaining results used to calculate the final result, or all results can be used. In a specific embodiment, system 1 includes automatic scanning logic. The automatic scanning logic can reside in the channel scanning logic block ιι〇 of the multi-touch subsystem 1〇6 separately from the channel scanning logic 11〇 in the multi-touch subsystem (10) or with the multi-touch subsystem 1 〇 6 The whole separation. In general, the auto-scan logic can autonomously read the bunk from the analog channel 108 and provide control of the analog channel 108. This is called, automatic scan mode,. 128015.doc -20- 200837618 Thus, the auto-scanning logic causes system 100 to scan multiple (four) panels i24 without the intervention of multi-touch processor 102 while deactivating - or multiple system clocks. This allows the multi-touch system 100 to conserve power or release components (e.g., the processor 102) to perform other tasks while the system is in the (four) mode. For example, since the user cannot continuously input data to the touch panel IN, it may be necessary to start the automatic scanning mode after a predetermined amount of time has elapsed and the system 1 does not sense any touch event. By doing so, the system 1 can save power when no data is input (because the automatic scan mode is enabled), but once the user resumes inputting data, the power is turned on again. 4 is a block diagram of one embodiment of an automatic scan logic. As shown in the figure, 'Auto Scan Logic can include Auto Scan Control, the basin can control column address and channel timing functions, and other functions. In the embodiment of the first embodiment, the 'automatic scan control·packageable (four) address state machine and the channel timing state machine are used to control the scanning of the multi-touch panel 124. As will be appreciated by those skilled in the art, various functions and components of automatic scan control 402 are shared or overlapped by track scan logic 110 and driver logic 114. , v township test map 4 ' can be written by the oscillator and calibration timing 4〇6. The county w ^ 〇 荡 can be a low-frequency oscillator or a high-frequency oscillator. However, due to the lack of force, a low-frequency oscillator may be required. The low rate oscillator can reside within the multi-touch subsystem 1〇6 or can reside external to the daylight touch subsystem 106. : After a fixed amount of time (called,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,, An interval, "only low-frequency vibrating device and detection time for i sweep 4 field sequence, which actively scans the multi-touch panel. Two system states can form an automatic scan mode. In the specific embodiment of the case, high frequency vibration The buffer 42 1 wakes up instantaneously. The faster the high frequency oscillator wakes up, the time the system spends on the active scanning panel. The more details of the frequency oscillator are applied at the same time as the applicant. ^ t t t t 11 11 / 649, 966 ^ t ^ ,Χ , # ^ ^,Aut〇matic

Fr = job cy Calibrati〇n" (attorney profile number MM4·2(10): B 〃 mode is incorporated herein. In a specific embodiment, high frequency oscillation = 21 series fast start vibration, which allows for lower power management in the system Status: Quickly lock after waking up to scan multiple touch panels. To reduce the time between wake-up, multi-touch panel and back to lower power state, it is advantageous to stabilize the oscillating signal in a short period of time. Minimize the role of the system 4 _ «that is, save power. Many crystal oscillators can be used for a few milliseconds. However, the fast-start oscillator circuit can be stabilized within tens of microseconds: Faster return to lower power management state by slower stabilization of the crystal oscillator driven system. In general, by automatically enabling automatic scan control 4〇2, then placing the state on wait for interrupt In the state, the automatic scanning procedure is enabled. The clock management is 414 and then the high frequency oscillator 421 is stopped and the timer 4〇4 is started, which causes the clock manager 414 to enable the high frequency oscillator 421 after the timeout is exceeded. 'Then will pass the request To the channel scan logic 110 to perform a scan 'but keep the processor inactive. The channel scan logic ιι〇 then obtains the multi-touch image at the pixel location, which can be programmed to the appropriate register to 128015.doc -22- 200837618: Designation. In the subtractor 417, the image from the soil line image stored in the baseline sub 4i9 can be subtracted from the _ specific channel 43G (which can be the analog channel of FIG. 3a); t touch image result Then, by comparing the result of the comparison:: and the threshold. If the final value is higher than the programmable threshold, then - interrupt the 'and wake up the processor. If the final value is lower than the threshold , the system remains in automatic scan mode until calibration_expiration or occurrence.

Accordingly, the 'auto-sweep (four) type allows the multi-touch data input to be read from the multi-touch panel 124 without the processor being processed. In a specific embodiment, each time the check timer 404 initiates an automatic scan sequence, the debt check time is reset: The detection time can range from 8 milliseconds to 2 seconds, for example 5 milliseconds. When the automatic scanning logic 400 stays in the automatic scanning mode for an extended period of time and no touch event exceeding the threshold is detected on the touch panel 124, the calibration timer 4〇6 can wake up the processor in the item. In a particular embodiment, the calibration timer 406 initiates "calibration" ("calibration time") after a predetermined amount of time has expired. The calibration may include waking up the high frequency oscillator and activating the system clock and the processor 102 to perform one of the multiple touch panels 1 〇 2. The calibration may also include a calibration function, such as addressing the sensor panel 124. Any drift, in a specific embodiment, the calibration time is greater than the detection time and can range from 2 seconds to 3 seconds. Further referring to Figure 4, the comparator 4 10 compares the offset compensation result with the above threshold In a specific embodiment, if the threshold is exceeded, one or more touch events have been detected on the panel 124, which causes the system 1 to exit the automatic scanning mode and enter the active scanning mode. The comparison of the threshold and the compensation result is done on a channel-by-channel basis, 128015.doc -23 - 200837618. In one embodiment, the threshold can be stylized into a threshold register. The gate 412 can be included after the calibration timer 4〇6 and the output path of the comparator 41. Accordingly, when the calibration time of the calibration timer 4〇6 or the threshold of the comparator 41〇 is exceeded, 〇 R gate can be re-enabled for processing Objective of the start and clock 102 transmits an interrupt signal to the processor and clock manager 414 1〇2.

The clock manager 4M can control one or more clocks in the system 1〇〇. In general, when the clock is not needed at a given time, the clock manager can disable the clocks to save power, and # when any deactivated clocks are needed, the clock manager 414 can Enable these clocks. In the specific embodiment: 'clock manager 414 can control low frequency oscillating device _, high frequency vibration (not, ',, member) and system clock (not shown), its timing processor 1 〇 2. The power management timer 416 can be included in the automatic scan logic. Power B „10 o'clock 41 6 to calculate to equal to the detection time minus the delay time — time. The delay time can be multi-touch system 1 〇〇 ready to implement the sweep: before the implementation of the scan " arrangement " high voltage The amount of time required for driver 118 (i.e., to provide a stable voltage supply) can be adjusted via the power management register and can be different for each channel 108 being scanned. To prevent false wake-up due to environmental noise, Including the noise management block 424. Wrong wake-up can cause the processor to exit the wait-for-interrupt state and actively scan the panel. In addition, repeated error triggering can result in a substantial increase in the overall power consumption of the system. The noise management block 424 can advantageously resolve more than The limit is due to, for example, a finger touch panel or a scan frequency due to noise corruption 128015.doc -24- 200837618 In a specific embodiment, the automatic scan logic 400 can scan at more than _ frequency I' and The final data is transmitted to the noise management block 424. The hole meter block 427 can calculate the historical noise level of the data obtained for different scanning frequencies, and The noise level history and associated frequency are maintained by the noise level RAM 425. The control and decision logic 428 can compare the ADC results obtained for the column scan at different frequencies. For example, if the ADC result data is used for the scan frequency. Tracking in a particular view f may cause the touch condition to exceed the threshold because touch will affect the resulting value for all scan frequencies. However, if the result data for a particular frequency is corrupted, then The result data at the scan frequency will likely not follow other scan frequencies' and the system excessive noise causes the threshold to be exceeded rather than the touch condition. In the latter case, the control and decision logic 428 can generate a stall signal 435. To prevent the processor 410 from generating a processor interrupt. If a noisy frequency channel is detected, the frequency can be removed from the frequency hopping table 426 and the 〇 block 429. The frequency hopping table 426 can contain information representative of the clear frequency channel. It can be programmed during the factory calibration period. After the scan is completed, the block 429 can transmit ° and the new scan frequency data to the channel timing logic 11 0. The frequency data can be used accordingly. The scanning frequency of the next channel timing sequence. Periodically changing the scanning frequency according to the noise environment makes the automatic scanning logic 4〇〇 stronger, which can finally assist the power reduction. To reach the low power state, all kinds of ratio channels are within 43〇 A charge amplifier (e.g., electrical amplifier 302) can be configured to operate in a stray capacitance mode. In one embodiment, the channel scan logic 11 can be transmitted by transmitting a spurious 128015.doc -25-200837618 capacitor The mode start signal to the analog channel 43 起始 to initiate a stray capacitance mode. The stray capacitance measurement in the initial multi-touch panel device is disclosed in the applicant's co-pending U.S. Patent Application Serial No. 11/65, No. 511 As discussed in detail, the title is "Analog Boundary Sc_ing", such as "〇n", the entire content of which is incorporated herein by reference. However, in one embodiment, the use of a stray capacitance mode does not provide an accurate location for the touch event to occur on the panel 124 because the spurious capacitance; the mode provides only one or more touch events. An indication of a beep on or near one of the scanned lines. On the other hand, it is advantageous to use a stray capacitance mode because only one scan is required to determine if a touch event occurs on the multi-touch panel 124; as opposed to the multiple scans that may be required to use the mutual capacitance mode. Accordingly, the use of fewer scans can significantly reduce the amount of power consumed by the scanning panel 124. For example, in the embodiment, it was found that the amount of power used for scanning using the stray capacitance mode is about the same as the amount of power dissipated due to leakage currents present in the multi-touch system. An exemplary automatic scanning procedure 500 in accordance with an embodiment is illustrated in the flow chart of FIG. Those skilled in the art will appreciate that various timing and memory storage issues are omitted from this flow diagram for clarity. The automatic scanning procedure 5 (9) begins with the system 100 in active scanning mode in step 502. Here, the processor 102 is enabled and the system 1 〇〇 actively scans the multi-touch panel 124. While still in the active scan mode, the program 5 determines in step 504 whether a sufficient touch event has occurred on the touch panel for a predetermined amount of time (e.g., within the range of i ms to several minutes). For example, this decision can be implemented by processor 102. Alternatively, a separate processor or dedicated logic, such as channel scan logic m, can perform this task. If it is found that there is already sufficient touch activity, then the process 500 returns to step 5〇2, and the system 1 remains in the active scan mode. On the other hand, if it is determined that there is no sufficient touch activity, the automatic scan mode is enabled in step 506. In a specific embodiment, the automatic scan mode is enabled by the processor 102 that transmits an automatic scan enable signal to the automatic scan control 4〇2. In another embodiment, the automatic scan mode is enabled by having the processor 1G2 set in the automatic scan register (which is: self-scan control 4〇2 monitoring). Further changes to the automatic scan mode can also be used, as will be appreciated by those skilled in the art. When the automatic scan mode is enabled, the processor 1G2' is deactivated (e.g., placed in the idle mode) in step 5〇8 (step 51()), and the high frequency leather vibrator is turned off (step 51). Steps 5, 8, and 512 are used to save power when the multi-touch panel 124 is not used. In the particular embodiment illustrated in FIG. 4, the auto-scan logic 408 may deactivate one or more of the components via the clock manager 414. Referring additionally to Figure 5, the detection timer is initiated and reset (step 514), and the calibration timing (4) 6 (step 516). The start and reset functions can be initiated by the Auto, Trace Control 402. The program then proceeds to the decision step: ' to determine if an interrupt signal has been received', such as from comparator (10), which indicates that the threshold has been exceeded. If it has been received (4), turn on any clock that is turned off during the self-study mode and enable the processor to call step 2〇+). The program 500 then returns to the active scan mode in step 5〇2. If no interrupt is detected, then routine 500 determines if the check timer 6〇4 has exceeded 128015.doc -27- 200837618 (step 522). If the investigation time has not been exceeded, the program returns to step 518. If the detection time is exceeded, then the program 5 determines if the calibration timer 406 has exceeded the calibration time (step 52A). If the calibration time is exceeded, the clock and processor are enabled (step 514), and the active scan mode is enabled (step 502). If the calibration time is not exceeded, the high frequency oscillator is awakened (ie enabled) in step 526 and obtained. An image of the multi-touch panel 124 (step Μ). Various embodiments may be used to obtain an image in step 524, which is discussed in detail below. In one implementation, the steps are completed when the processor 1〇2 is deactivated. The image obtained internally. Once an image has been obtained in step 528, the program 5 determines whether the programmable threshold is exceeded (step 53A). This can be done by comparing the offset compensation result 324 received from the ADC 308 ( Figure 3a) is completed with a threshold. If the threshold is exceeded, the clock and processor 1〇2 are enabled (step 514), and the routine 500 returns to the active scan mode (step 502). If the threshold is not exceeded, Program 500 then returns to step 512 (turning off the high frequency clock). Further, with respect to step 524, various embodiments may be used to obtain multiple touch images. For example, an image may be obtained that measures mutual capacitance or stray capacitance. In the case of a capacitor (which may be referred to as a mutual capacitance mode), the system 100 detects a change in capacitance at each node of the multi-touch panel as described above with reference to Figures 3b and 3c. Accordingly, in order to use a mutual capacitance mode The images of the multi-touch panel 124 are obtained, typically scanning the columns. Instead of the specific embodiment, only the selected columns are scanned to save energy. Example %, scanning every other column, or scanning a column located in a specific area of the multi-touch panel 124 For example, the multi-touch panel 128015.doc • 28· 200837618 η:: bottom or middle area. In other embodiments, the selection frame of the multi-touch panel 124 is scanned using the mutual, valley-type scanning. Use the mutual capacitance mode to measure the stray capacitance (which = stray capacitance mode "). Measure the spurious in the multi-touch panel device. The copending US patent application No. 5U t..^,# ^v,Anal〇g B〇undary scan^g 〇n :y apacitance", the entire contents of which are incorporated herein by reference. or:: discharge mode can measure the output of all rows of multiple touch 124 in one scan Electric: Μ' Ο康In the case of the automatic scanning cycle of the specific embodiment, the automatic scanning cycle can be, for example, a period of time, using a minimum power of 1 for a low frequency clock only 4〇8, a scout timer 4 〇 4 Fen Shi Men De 杳 杳 406 406. Over the debt check period. During this time, scan the eve map scan activity week people Tian Xi touch panel 124, without the need for processor 102 rate r: for automatic scanning The required low frequency clock 404, high frequency sheep pulse, automatic scanning control during the time of the investigation, and two pieces of power supply. This power consumption of A, but lower than the processor 102 and shoulder pulse ( For example during active scan mode). In addition, with respect to FIG. 6, if the panel 124 is used - or more than " _ M-type" material scanning multi-touch scanning γ - in the embodiment, scanning 48 columns, each column needs to be approximately (M ms pin-up - about 4.8 ms. If you use 'scan every column, you need to scan a total. This scan needs about 〇1 lb 1 and only the real _人• 。 。. Therefore, use stray power 128015.doc •29- 200837618 ms 'In contrast to the 4 · 8 ms in this example), and for the mutual capacitance mode described in this example, the touch multi-touch is determined by the &, + ^ 1=1... method of the stray capacitance mode. The exact position of the panel 124 can be used in a mixed mode, and the hybrid mode can include the initial use of the hybrid and + ~ + history of the capacitive mode to detect the multi-touch panel 124. The touch event, if the right touches the touch event, the mutual capacitance mode is used.

To provide an accurate location for touch events. In addition, in one of the systems 1 and the embodiment, the touch event may be required to occur in a predetermined manner so as to exceed the limit value. For example, the system may require touch events to occur at the same time or almost simultaneously in a particular location or in a specific manner (eg, analog dialing rotation; |. if the first F; The automatic scan mode can continue as described in routine 500 (e.g., returning to step 512). In one embodiment, the automatic scan mode sweeps in a single frequency band.

Capacity mode is faster (requires 〇.! and uses less power (about 2% of the power in the middle). This saves power. Or 'auto scan mode can scan at multiple different frequencies, as described in Figure 3c In the specific embodiment, the automatic scanning logic includes a noise management block. The noise management block prevents the presence of noise, but the user does not touch the multi-touch screen, but exceeds the threshold. The processor is woken up in a quasi-case. Power is saved by maintaining the auto-scan mode. The noise management block can be used to investigate the noise level for several channels. If a channel has excessive Csig readings, it may be Interference source on the channel. If all channels have the same reading, it may be the user's touch panel. According to the noise level, the noise management block provides the frequency skip table to the channel scan logic, 128015.doc -30- 200837618 It has a clean channel up to frequency. The m management block also includes a calibration engine to recalibrate the internal high frequency oscillator to prevent the shaker from drifting into the noise channel. An exemplary action (e.g., cellular) telephone 736, which may include a multi-touch panel 724, display device 73A, and other computing system blocks within the computing system 1 of Figure i. In the example of Figure 7a, The one or more multi-touch sensors detect the user's cheeks or ears, and the computing system 1 can determine that the mobile phone 736 is being lifted to the user's head, so that the multi-touch subsystem 106 and the multi-touch can be Some or all of the panel 724 is powered down from the display device 730 to save power. Figure 8 illustrates an exemplary digital audio/video player that may include multiple touch panel 824, display device 830, and Figure i calculations. Other computing system blocks within the system 1. Although the invention has been described in terms of several preferred embodiments, there are variations, permutations, and equivalents within the scope of the invention. For example, the term "computer" does not necessarily mean The combination of any particular type of device, hardware and/or software shall not be considered limited to a multi-purpose or single-use device. Furthermore, although specific embodiments have been described herein with respect to touch screens, this is a The teachings can also be applied to touch pads or any other type of touch surface type of sensor. For example, although specific embodiments of the present invention are primarily described herein for use with touch sensor panels, proximity sensing The panel, which senses a hover, event or condition, can also be used to generate a modulated output k number by analog channel detection. Proximity sensor panel in Applicant's co-pending US application No. 11/ </ RTI> </ RTI> </ RTI> </ RTI> </ RTI> </ RTI> </ RTI> </ RTI> </ RTI> <RTIgt; </ RTI> <RTIgt; </ RTI> </ RTI> </ RTI> </ RTI> </ RTI> </ RTI> </ RTI> </ RTI> </ RTI> <RTIgt; As used herein, "touch, event or condition shall be considered to include a "hover" event or condition, and may be collectively referred to as another touch surface panel" as deemed to include a "near-sensing panel", in addition, although this disclosure The content is mainly for capacitive sensing, it should be noted that some or all of the features described herein can be applied to other sensing methods. It should also be noted that there are many alternative embodiments of the method and apparatus of the present invention. &lt;RTI ID=0.0&gt;&quot;&quot;&quot;&quot;&quot;&quot;&quot; A computing system that uses a multi-touch panel wheeled device. Figure 2a illustrates an exemplary capacitive multi-touch panel in accordance with an embodiment of the present invention. Figure 2b is a steady state in accordance with an embodiment of the present invention. Side view of an exemplary capacitive touch sensor or pixel in a (no touch) condition. Figure 2 is a dynamic (touch) condition in accordance with an embodiment of the present invention. A side view of a capacitive touch sensor or pixel. Figure 3a illustrates an exemplary analog channel in accordance with an embodiment of the present invention. Figure 3b is an input to an analog channel in accordance with an embodiment of the present invention. A detailed description of the virtual grounded charge amplifier, and the capacitance that is distributed by the capacitive touch sensor and seen by the charge amplifier. 128015.doc -32- 200837618 Figure 3c illustrates multiple pulses in accordance with an embodiment of the present invention The series of non-standard Vstim signals, each pulse train has a fixed number of pulses, and each pulse train has a different frequency Fstim. Figure 4 is a block diagram illustrating automatic scanning logic in accordance with an embodiment of the present invention. An automatic scanning procedure implemented by the automatic scanning logic of FIG. 6 in accordance with an embodiment of the present invention is illustrated.

Figure 1 illustrates an "investigation mode, power management profile" in accordance with an embodiment of the present invention. Figure 7 illustrates an exemplary mobile device that can include multiple touch panels in accordance with an embodiment of the present invention. , display device, and other computing system blocks. Figure 8 illustrates an exemplary digital audio/video player that can include multiple touch panels, display devices, and other computing system regions in accordance with an embodiment of the present invention. [Main component symbol description] 100 Computing system 102 Multi-touch panel processor 104 Peripheral device 106 Multiple touch subsystem 108 Analog channel 110 Channel scan logic 112 RAM 114 Driver logic 128015.doc •33- 200837618 116 Multi-touch Subsystem Output 118 Driver Level 120 Decoder 122 Multiple Touch Panel Column Input 124 Multi Touch Panel 126 Image Component 128 Host Processor 130 Display Device 132 Program Memory 200 Capacitive Multiple Touch Panel 202 Pixels 204 Columns 206 Lines 208 Electric Field Line 210 Dielectric 212 Finger 214 AC Stimulation 216 Pulse Train 300 Analog channel/event detection and demodulation circuit 302 Virtual grounding power amplifying 304 Signal mixer 306 Offset compensation 308 Analog to digital converter 314 Signal mixer output 128015.doc -34- 200837618 316 Demodulation Waveform 322 Offset Compensation Output 324 Result 330 Offset Mixer 330a Pulse Train Column 330b Pulse Train Column 330c Pulse Train 332 Rectifier 334 Subtractor 336 Rectifier Output 338 Subtractor Output 400 Auto Scan Logic 402 Auto Scan Control 404 Scout Timer 406 calibration counter 408 oscillator 410 comparator 412 OR gate 414 clock manager 416 power management timer 417 subtractor 419 baseline RAM 421 high frequency oscillator 424 noise management block 128015.doc -35- 200837618 425 noise Level RAM 426 Frequency Hopping Table 427 Noise Calculation Block 428 Control and Decision Logic 429 10 Block 430 Analog Channel 435 Delay Signal 500 Auto Scan Program 600 Power Management Profile 604 Scout Timer 724 Multi Touch Panel 730 Display Device 736 Mobile phone 824 multi-touch panel 830 display Device 128015.doc -36-

Claims (1)

200837618 X. Patent Application Range: 1. A touch surface device comprising: a sensor panel having at least one sensing node, the at least one sensing node providing one of an event indicating that one of the events occurred at the panel An output signal that is present or absent; a processor operatively coupled to the panel, the processor capable of - processing the output signal of the panel; and an automatic scan logic circuit (4) connectable to the sensor The panel and the processor, the automatic scanning logic can determine whether one of the panels occurs at the side of the panel, and the presence or absence of the edge does not require the intervention of the processor. 2. The touch surface device of claim 2, wherein the automatic scan logic enters an automatic scan mode when a predetermined amount of time is not sensed on the panel. 3. The touch surface device of the claim item, wherein the automatic scanning logic comprises a singer, although the Detecting Timer reaches a first predetermined amount of time. 2 The heartbeat timer starts the sensor-scanning , which is used to determine the presence or absence of "the event that was born at the panel." 4. Item touch surface device, wherein the automatic scanning logic advances to a certain level (4) ^ '# The calibration timer reaches longer than the first pre-start - the first: a predetermined amount of time 'the calibration timer automatically starts 5 · as requested The touch of item 4 # raw calibration sequence, = (4) The calibration timer starts to determine the drift that occurs in the sensor panel. 128015.doc 200837618 6· Touch surface device 'where the automatic sweep logic includes an arrival; the power management timer transmits - initiates a signal to - or a plurality of voltages before the detection timer Drive-clock management m:* 'where the automatic scan logic includes its ability to disable and enable one or more clocks incorporated into the touch surface device. It further includes incorporating the touch, which further comprises incorporating the calculation, which further comprises incorporating the calculation. 8. The touch surface device panel device of claim 1 is a computing system. 9. A mobile telephone of one of the touch surface device systems of claim 8. 1) A digital audio player such as the touch surface device system of claim 8. 11. Apparatus for generating an image of an event on a sensitive surface, comprising: an automatic scanning logic circuit coupled to a sensor panel, the automatic scanning logic circuit capable of exceeding a first predetermined time An automatic scan sequence is performed after the amount without the intervention of a sensor processor. 12. The apparatus of claim 1, wherein the automatic scan sequence comprises: scanning the sensor panel to determine an presence or absence of an event at the panel, generating a value representative of the presence or absence of the event And compare the representative of the event with a predetermined threshold. 13. The apparatus of claim 11, wherein the automatic scanning logic comprises. 128015.doc 200837618 14. 15. A check timer, the automatic scan sequence; a calibration timer, a calibration sequence. The device amount of claim 11 is not exceeded by the device capacitance of claim 12. And an automatic scan sequence is initiated after it has exceeded a first amount of time, wherein the device has only exceeded (four) - the predetermined calibration time. Where the automatic scan sequence includes measuring spurs that begin after the first predetermined amount of time has elapsed 16. The device of claim 13, wherein the soap sequence of i, VIII comprises calibrating the device for drift within the panel. For example, the device of claim 13, wherein the calibration sequence includes one of the panels actively knowing that the active scan includes a device that is implemented by the sensor processor, such as the device of claim 12, wherein the event includes A touch of an object immediately adjacent to one of the surfaces of the touch panel. The requester 11 is placed, wherein the automatic scan logic forms part of a single multi-touch subsystem for processing events. 〇 'A device as claimed π, which further comprises a computing system incorporated into the device. 21. The device of claim 20, further comprising a mobile phone incorporated into the computing system. 22. The device of claim 2, further comprising a digital audio player incorporated into the computing system. 23. A method for scanning a sensor panel, comprising: 128015.doc 200837618 Touch event up--, the automatic scan mode does not sense one or more predetermined amounts of time on the sensor panel Thereafter, the initial automatic sweep mode includes: a) deactivating a sensor panel processor; b) when the second predetermined amount of time has elapsed, the execution-detection scan C) has exceeded the third time The method of claim 23, wherein the method of claim 23, wherein the detecting scan comprises: the field is scanned for the presence or presence of the panel at the panel; the generating representative occurs differently from the panel The plurality of values of the location event, and comparing the one or more values to a threshold, and enabling the sensor panel processor if the one or more values exceed the threshold. 25. The method of claim 23, wherein the calibration scan comprises: activating the sensor panel processor; scanning the sensor panel for an presence or absence of an event at the panel; and performing a calibration to resolve The drift that occurs within the sensor panel. 26. The method of claim 25, wherein the calibration scan further comprises turning on a high frequency oscillator. The method of claim 23, wherein the detecting scan comprises obtaining an image of the sensor panel and comparing the image with a threshold. 28. The method of claim 24, wherein the step of generating a value comprises measuring a stray capacitance value of one or more of the touch sensors in the sensor panel. The method of claim 24, wherein the step of generating the value comprises measuring a mutual capacitance value of one or more of the touch sensors in the sensor panel. The method of claim 24, wherein the automatic scanning mode further comprises initiating a voltage driver operatively coupled to the sensor panel prior to exceeding the second predetermined amount of time. 31. The method of claim 23, wherein the initial step further comprises setting an automatic scan enable bit. 32. The method of claim 23, wherein the performing a scout scan further comprises resetting a scout timer. 33. The method of claim 24, further comprising stylizing the threshold into a memory unit. 34. The method of claim 33, wherein the memory storage unit comprises a programmable register. 3 5 . A multi-touch subsystem for detecting an event on a sensor surface or with respect to a sensor surface and generating an image of one of the events, comprising: &quot;drive logic' Used to generate one or more wheeling stimuli; channel scanning logic configured to control the driver logic to drive one or more of a sensor panel by employing the one or more input stimuli a sensor column to scan each sensor column; an auto-scan logic 'configured to control the driver logic to drive one or more of the sensor panels by using the one or more input stimuli Sensors are arranged to scan the one or more sensor columns, the automatic 128015.doc 200837618 scan logic is also configured to self- or multiple sensors after a first scheduled daytime summer expires Columns and decides whether any of the automatic scans exceeds a threshold; and one or more analog channels, the various types of channels can be lightly coupled to the sensor panel - the sensor ratio The channel is configured to receive a representative hair: in the sensor Such sensors within the - at the - one of the events' on behalf of one value and produce the event. 36 = The multi-touch subsystem of claim 35, wherein the auto-scan logic package = scout timer&apos; is configured to initiate an auto-scan when the -first predetermined time is exceeded. 37. The multi-touch subsystem of 35, wherein the automatic scanning logic package 21 is configured to initiate a calibration scan when the predetermined time is exceeded, wherein the calibration scan Contains scans—or multiple columns—and calibrates for drift that occurs within the one or more columns. The multiple touch subsystem of claim 35, wherein the automatic scan logic package is a clock manager configured to control a system clock of the timing-sensor panel processor. 39. The multi-touch subsystem of claim 38, wherein the clock manager disables the system after detecting a touch event after the scan time is over a third time amount pulse. The multi-touch subsystem of claim 35, wherein the automatic scan logic step comprises a power management timer configured to initiate operatively before the expiration of the first pre-expansion time amount Connect to one or more of the _sensor panels. 128015.doc 200837618 41. The multi-touch subsystem of claim 35, wherein the automatic scan logic is, and is, forcibly activated to activate a sensor panel processor when the threshold is exceeded. 42. A method for detecting multiple touch events on a surface of a sensor or with respect to a sensor surface, comprising: after expiration of a first predetermined amount of time, by at least Some applications that stimulate a sensor panel that scans the sensors organized in columns and rows; The rows of the touch panel are coupled to - or a plurality of analog channels during the scanning of each sensor panel column for generating - or more that occur at different locations along the column at about the same time One or more values of the touch event; and comparing the one or more values with a threshold, and when the threshold is exceeded, a sensor panel processor is activated. 43. The method of claim 42, wherein each of the objects of the sensor surface is tightly touched, and each of the Panyu &amp; ancient touch events is included at approximately the same time. Multiple touch events in different locations. 44. The method of claim 42 wherein the step of generating comprises generating the one or more values representing one or more events within a single multi-touch subsystem. 45. The method of claim 42, further comprising performing a calibration scan after the expiration of a calibration timer. 46. The method of claim 42, wherein the further progress comprises resetting a scout timer after expiration of the first predetermined time period. 47. The method of claim 42, wherein the method is further performed after a second predetermined amount of time is not detected on the surface of the sensor, and the event is disabled. 128015.doc 200837618 Detector panel processor 48. The method of claim 47 begins with a processor. The method of claim 48 further includes turning off a 50. The method of claim 42 begins with an active scan mode: step-by-step Included in the dynamic scan mode of the sensor panel is disabled. The step of starting the automatic scanning mode in 1 is the system clock. An improvement includes when the threshold is exceeded. A device for sensing a sensor comprising: an event on a panel, the bag member for providing an output signal indicating the presence or absence of an output signal; After the amount of time, _self-" is used to have exceeded the -first-predetermined _ automatic learning mode; and = Detect mode component for performing a detection mode after the second pre-equivalent has been exceeded. 52. The apparatus of claim 51 further comprising means for implementing a calibration mode in a number of events that have exceeded a third number of events. 53. A mobile phone, comprising: a sensor panel, having 1 at least one sensing node, the at least one sensing node providing f, 仏払 does not occur at one of the events at the panel Or an output signal that is not present; processing, operatively coupled to the panel, the processor capable of processing the wheeled signal of the panel; and an automatically known circuit operatively coupled to the sensor Panel 128015.doc 200837618 and a processor 'a automatic scan logic can determine the presence or absence of an event occurring at the panel, without the intervention of the processor 0 54. Action by μ seeking 53 The telephone, wherein the automatic scanning logic enters the _auto-scan mode when the event is not sensed on the panel for a predetermined time ΐ. 55. For example, in the action phone of the monthly proposal 53, wherein the automatic scanning logic includes a scout timer, when the (four) check timer counts for a predetermined amount of time, the scout timer starts the sensor-scan Used to determine the presence or absence of an event occurring at the panel. 56. The mobile telephone of claim 55, wherein the automatic scanning logic further includes a calibration timer, t the calibration hopper arrives The calibration timer automatically starts - scans when the predetermined amount of time - the predetermined time amount is longer than 57. The mobile telephone of claim 55, wherein the calibration timer starts a sequence, which resolves the sensing The drift occurring in the panel. 58. The mobile telephone of claim 53, wherein the automatic; the logic management force timer, the power management timer transmitting a start signal to the first time before the detecting timing夕 ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ a plurality of clocks. A digital audio player comprising: 128015.doc 200837618 A sensor panel having at least one sensing node, the at least one sensing node providing an indication that occurs on the panel An output signal in the presence or absence of one of the events; a processor operatively coupled to the panel, the processor capable of processing the output signal of the panel; and an auto-scan logic circuit operatively coupled Up to the sensor panel and the processor, the automatic scan logic can determine the presence or absence of an event occurring at the panel without the intervention of the processor. 61. Digital audio as claimed in claim 60. a player, wherein the automatic scanning logic enters an automatic scanning mode when an event is not sensed on the panel for a predetermined amount of time. 62. A digital audio player as claimed in claim 6 wherein the automatic scanning logic comprises a scout timer that initiates scanning of one of the sensors when the scout timer reaches a first predetermined time , Determining the presence or absence of an event occurring at the panel. 63. The digital audio player of claim 62, wherein the automatic scanning logic further comprises a calibration timer, when the calibration timer reaches longer than The calibration timer initiates a scan for a predetermined amount of time - a second predetermined amount of time. 64. The digital audio player of claim 63, wherein the calibration timer initiates a calibration sequence that resolves the sensing A drift occurring within the panel. 65. The digital audio player of claim 6G, wherein the automatic scan logic includes a power management timer that reaches the predetermined amount of time at the detection timing 128015.doc 200837618 A start signal is transmitted to one or more voltage drivers. 66. The digital audio player of claim 6, wherein the automatic scan logic includes a clock manager capable of deactivating and enabling one or more clocks incorporated into the mobile phone. 67. A multi-event sensitive device, comprising: a sensor panel having a plurality of sensing nodes, the plurality of sensing nodes providing a one indicating presence or absence of one of an event occurring at the panel An output signal; and an auto-scan logic circuit operatively coupled to the sensor panel, the auto-scan logic capable of determining the presence or absence of an event occurring at the panel, the auto-scan logic including noise The management circuit's (4) state is used to distinguish between the presence of one of the events and the noise present within the device. 68. The multiple event sensitive device of claim 67, further comprising a processor operatively coupled to the automatic scan logic, the processor configured to disable when an automatic scan mode is initiated, and The processor is configured to be enabled when the automatic scan mode is cancelled. 69. The multiple event-sensitive device of claim 67, wherein determining the presence or occurrence of an event occurring at the panel comprises measuring a change in stray capacitance within the sensor panel. 7. The multiple event sensitive device of claim 67, wherein determining the presence or absence of an event occurring at the panel comprises measuring a change in mutual capacitance within the sensor panel. 128015.doc -11 -